Incandescent oil-lamp.



T. J. CBANSTON.

INCANDESCENT OIL LAMP.

(Application filed Nov. 19, 1898.)

N0. 632,646. Patented Sept. 5, I899.

(No Model.)

11-: Noams PETERS cu. Puo'roumu. WASHINOYON. n. c.

6 above the deflector is formed with PQIfOI'Hr.

NITED STATESPATENT OFFICE.

THOMAS JAMES CRANSTON, OF FOIVNHOPE, ENGLAND, ASSIGNOR TO THE ERA INCANDESOENT OIL LAMP COMPANY, LIMITED, OF LON- DON, ENGLAND.

SPECIFICATION formingpart of Letters Patent No. 632,646, dated September 5, 1899.

Application filed November 19, 1898. erial No.696,902. (No model.)

To all whom it may concern:

Be it known that I, THOMAS JAMEs GRAN STON, a citizen of England, residing at Ringfield, Fownhope, Herefordshire, England, have invented certain new and useful Improvements in Burners for Incandescent Oil- Lamps, (for which a patent has been applied for in Great Britain, dated May 24, 1898, No. 11,803,) of which the following is a specification.

This invention relates to an improved construction of burner for incandescent oillamps; and it has for its object to produce a more perfect and reliable blue flame than has been possible to obtain by means of constructions of such burners heretofore employed-that is to say, a blue flame that will not be affected by slight drafts, that will not smoke, and that will be extended over the greater portion of the mantle and thus produce a more uniform incandescence thereof. This object is accomplished in the manner and by the means hereinafter described and claimed, reference being made to the accompanying drawings, in which- Figure 1 is avertical section of the burner and parts in connection therewith; and Fig. 2 is a section at a: m, Fig. 1.

In the drawings, a a are the inner and outer wick-tubes. Z) is the wick; c d, the two caps, with holes c d at their bottoms for the entrance of air to the space between the two caps and to the space outside the outer cap, this supply being necessary to prevent outward bulging of the mantle a toward the lamp-glass. These two air-currents are designated by the arrows 5 and 6. In addition to these there is also the air-current passing between the wick and the inner cap.

The flame-deflector tube consists of a lowe portion (2, by which it is fixed in the wicktube, the portions 6 e of reduced diameter, and the flame-deflector f, with downward-directed flange, the portion e of the tube being formed With perforations i, while the portion tions Z. The outer cap 0 extends up to the level of the deflector f while the inner cap (1 only extends to the level of the wick-tube.

The action of the burner is as follows: Aircurrents 1 and 2, passing up through the lower holes of the tube 6 6, enter into combustion with a portion of the vapors given off on the inner periphery of the Wick and form the feeding flame. Other portions of the vapors pass up partly unburned through the annular opening 0 between the wick and the cap (1 and enter into combustion with the aircurrents & and 5, passing up through the cap d and between the caps c and d, while a still further portion of the unburned vapor being caught in eddy-currents formed under the deflector f (owing to the downward-directed flange thereof) is drawn through the top row of holes under the deflector into the interior of the part c of the tube owing to the suc* 'tion of the current of air rising up therein and, mixing with such air,then passes out with the same through the holes Z above the de-' fiectorf and ignite on issuing and mixing with the portion of the air rising from 4: and 5 which has not already entered into combustion. This flame, combining with that produced below, forms a perfect blue flame of such a size as to extend some distance up the mantle a and produces the uniform incandescence thereof.

I am aware that most of the features above described are not new in themselves and have been used in numerous combinations. The present invention is limited to the definite combination described, whereby the abovedescribed advantageous action is obtained.

Having thus described the nature of this invention and the best means I know of carrythe tube 6' above the wick-tubes a tubular extension 6 with perforations 3 above the deflector f, an outer cap 0 terminating at the level of the deflector f and having air-holes c, an inner cap 61 terminating at the level of the Wick-tubes and having air-holes 61, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two snbscribingwitnesses.

THOMAS JAMES CRANSTON. Witnesses:

OLIVER IMRAY, bro. 1?. M. MILLARD. 

